Variation of nonlinear refractive index in dye-doped liquid crystals by local and nonlocal mechanisms

被引：23

作者：

Rodriguez-Rosales, Antonio A. ^{[1
]}

Morales-Saavedra, Omar G. ^{[1
]}

Roman-Moreno, Carlos J. ^{[1
]}

Ortega-Martinez, Roberto ^{[1
]}

机构：

[1] Univ Nacl Autonoma Mexico, CCADET, CU, Mexico City 04510, DF, Mexico

来源：

OPTICAL MATERIALS | 2008年 / 31卷 / 02期

关键词：

Nonlinear optics; Optical nonlinearities in organic materials; Kerr effect; Self-action effects; Liquid crystals; Z-Scan;

D O I：

10.1016/j.optmat.2008.05.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report in this work on the simultaneous presence of both positive and negative nonlinear optical (NLO) refractive indexes measured in methyl-red dye doped 5CB liquid crystal (LC). Characterization of these materials was performed according to the Z-Scan technique under cw He-Ne laser irradiation, taking into account the polarization and temperature dependence of the NLO-refractive index, and how these parameters are related to local and nonlocal mechanisms. The experimental conditions and a possible explanation for the simultaneous presence of positive and negative nonlinear refractive indexes are carefully discussed. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：350 / 360

页数：11

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